Helen Wilkinson

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The sun has long been thought to guide bird navigation as the second step in a two-stage process, in which determining position using a map is followed by course setting using a compass, both over unfamiliar and familiar terrain. The animal's endogenous clock time-compensates the solar compass for the sun's apparent movement throughout the day, and this(More)
A model-based prioritisation exercise has been carried out for the Water Framework Directive (WFD) implementation. The approach considers two aspects: the hazard of a certain chemical and its exposure levels, and focuses on aquatic ecosystems, but also takes into account hazards due to secondary poisoning, bioaccumulation through the food chain and(More)
Alcohol Abuse in Older People – presentation and scope of the problem – a clinical review Users may access full items free of charge; copies of full text items generally can be reproduced, displayed or performed and given to third parties in any format or medium for personal research or study, educational or not-for-profit purposes without prior permission(More)
Mortality in these outbreaks has been high, and measures to control tuberculosis are therefore being urgently reviewed in the United States. In the Medical Research Council's surveys of notifications of tuberculosis in or more of initial isolates of M tuberculosis from respiratory specimens from previously untreated patients were fully sensitive to(More)
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